mod-md.sh

   1 #!/bin/sh
   2 #
   3 # geninitrd mod: mdadm
   4
   5 # if we should init md (softraid) at boot
   6 have_md=no
   7
   8 # setup geninitrd module
   9 # @access       public
  10 setup_mod_md() {
  11         mdassemble=$(find_tool $initrd_dir/mdassemble /sbin/initrd-mdassemble)
  12         if [ -x /sbin/mdadm -a -x "$mdassemble" ]; then
  13                 USE_MD=yes
  14         else
  15                 USE_MD=no
  16         fi
  17 }
  18
  19 # return true if mdadm is set on $devpath
  20 # @param        string $devpath device node to be examined
  21 # @access       public
  22 is_md() {
  23         local devpath="$1"
  24
  25         # mdadm disabled
  26         if ! is_yes "$USE_MD"; then
  27                 return 1
  28         fi
  29
  30         if [[ "$devpath" == /dev/md* ]]; then
  31                 return 0
  32         fi
  33
  34         return 1
  35 }
  36
  37 # find md modules for $devpath
  38 # @param        $devpath        device to be examined
  39 # @return       false if $devpath is not on md
  40 # @access       public
  41 find_modules_md() {
  42         local found raidlevel
  43
  44         if [ -f /etc/mdadm.conf ]; then
  45                 debug "Finding RAID details using mdadm for rootdev=$1"
  46                 eval `(/sbin/mdadm -v --examine --scan --config=/etc/mdadm.conf;/sbin/mdadm -v --detail --scan --config=/etc/mdadm.conf) | awk -v rootdev="$1" '
  47                 BEGIN {
  48                         found = "no";
  49                         dev_list = "";
  50                         raidlevel = ""
  51                         rootdev_devfs = rootdev;
  52                         if (rootdev ~ /\/dev\/md\/[0-9]/) {
  53                                 gsub(/\/dev\/md\//,"/dev/md",rootdev_devfs);
  54                         }
  55                 }
  56
  57                 /^ARRAY/ {
  58                         if (($2 == rootdev) || ($2 == rootdev_devfs)) {
  59                                 raidlevel=$3;
  60                                 gsub(/level=/,NUL,raidlevel);
  61                                 if (raidlevel ~ /^raid([0-6]|10)/) {
  62                                         gsub(/raid/,NUL,raidlevel);
  63                                 };
  64                                 found="yes";
  65                                 getline x;
  66                                 if (x ~ /devices=/) {
  67                                         dev_list = x;
  68                                         gsub(".*devices=", NUL, dev_list);
  69                                         gsub(",", " ", dev_list);
  70                                 }
  71                         }
  72                 }
  73
  74                 END {
  75                         print "have_md=" found;
  76                         print "raidlevel=" raidlevel;
  77                         print "dev_list=\"" dev_list "\"";
  78                 }'`
  79         fi
  80
  81         if [ "$have_md" != "yes" -a -f /etc/raidtab ]; then
  82                 die "raidtools are not longer supported. Please migrate to mdadm setup!"
  83         fi
  84
  85         if is_yes "$have_md"; then
  86                 case "$raidlevel" in
  87                 [01]|10)
  88                         find_module "raid$raidlevel"
  89                         ;;
  90                 [456])
  91                         find_module "-raid$raidlevel"
  92                         find_module "-raid456"
  93                         ;;
  94                 linear)
  95                         find_module "linear"
  96                         ;;
  97                 *)
  98                         warn "raid level $number (in mdadm config) not recognized"
  99                         ;;
 100                 esac
 101         else
 102                 die "RAID devices not found for \"$1\", check your configuration!"
 103         fi
 104
 105         rootdev_nr=$(( $rootdev_nr + 1 ))
 106         eval "rootdev${rootdev_nr}=\"$1\""
 107         eval "dev_list${rootdev_nr}=\"${dev_list}\""
 108
 109         for device in $dev_list; do
 110                 find_modules_for_devpath $device
 111         done
 112 }
 113
 114
 115 # generate initrd fragment for md
 116 # @access       public
 117 initrd_gen_md() {
 118         debug "Setting up mdadm..."
 119
 120         inst_exec $mdassemble /bin/mdassemble
 121
 122         # LVM on RAID case
 123         local dev_list_extra ex_dev
 124         dev_list_extra=$(awk '/^DEVICE / { for (i=2; i<=NF; i++) { printf "%s ", $i; }; } ' /etc/mdadm.conf | xargs)
 125         if [ "$dev_list_extra" = "partitions" ]; then
 126                 # FIXME: handle this case (see man mdadm.conf)
 127                 echo "DEVICE partitions" >> "$DESTDIR/etc/mdadm.conf"
 128                 dev_list_extra=""
 129         else
 130                 for ex_dev in $dev_list_extra; do
 131                         echo "DEVICE $ex_dev" >> "$DESTDIR/etc/mdadm.conf"
 132                 done
 133         fi
 134
 135         local cr_rootdev cr_dev_list do_md0=1 nr cr_dev_list_md f cr_md_conf
 136         for nr in `seq 1 $rootdev_nr`; do
 137                 eval cr_rootdev="\$rootdev${nr}"
 138                 eval cr_dev_list="\$dev_list${nr}"
 139                 debug echo "Setting up array ($cr_rootdev = $cr_dev_list)"
 140
 141                 [ "$cr_rootdev" = "/dev/md0" ] && do_md0=0
 142
 143                 echo "DEVICE $cr_dev_list" >> "$DESTDIR/etc/mdadm.conf"
 144                 cr_dev_list_md="$(echo "$cr_dev_list" | xargs | awk ' { gsub(/ +/,",",$0); print $0; }')"
 145                 cr_md_conf=$(/sbin/mdadm --detail --brief --config=/etc/mdadm.conf $cr_rootdev | awk ' { gsub(/spares=[0-9]+/, "", $0); print $0; }')
 146                 if [ -n "$cr_md_conf" ]; then
 147                         echo "$cr_md_conf" >> "$DESTDIR/etc/mdadm.conf"
 148                 else
 149                         echo "ARRAY $cr_rootdev devices=$cr_dev_list_md" >> "$DESTDIR/etc/mdadm.conf"
 150                 fi
 151
 152                 for f in $cr_dev_list $cr_rootdev $dev_list_extra; do
 153                         # mkdir in case of devfs name
 154                         inst_d $(dirname $f)
 155                         [ -e "$DESTDIR/$f" ] && continue
 156                         # this works fine with and without devfs
 157                         inst $f $f
 158                 done
 159         done
 160
 161         echo "mdassemble" | add_linuxrc
 162
 163         # needed to determine md-version
 164         if [ "$do_md0" -eq 1 ]; then
 165                 mknod $DESTDIR/dev/md0 b 9 0
 166         fi
 167 }